E21D 9/0657
Structurally associated with rock crushers
Official title: {structurally associated with rock crushers}
E21D9/0657 (Structurally associated with rock crushers) appears on 11 US grants and 0 published applications in this corpus.
Search patents in E21D- Granted patents
- 11
- Published applications
- 0
- Assignees
- 4
- Inventors
- 11
- Latest grant
- 25 Jan 2000
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Tunnel boring machine with crusher25 Jan 2000US 6,017,095 A
- Tunneling machine with center cutter and debris removing means1 Aug 1995US 5,437,500 AHerrenknecht AG
- Shield tunneling machine28 Feb 1995US 5,393,172 AKabushiki Kaisha Iseki Kaihatsu Koki
- Shield tunnelling machine23 Jun 1992US 5,123,708 AKabushiki Kaisha Iseki Kaihatsu Koki
- Method for boring hole in the ground and apparatus therefor7 Jan 1992US 5,078,545 AKabushiki Kaisha Iseki Kaihatsu Koki
No published applications in this class yet.
Most cited
By later US patents
- Tunnel boring machine with crusher29US 6,017,095 A2000
- Shield tunneling machine25US 4,655,493 AKabushiki Kaisha Iseki Kaihatsu Koki · 1987
- Shield tunneling method and machine therefor21US 4,406,498 AKabushiki Kaisha Iseki Kaihatsu Koki · 1983
- Tunneling machine with center cutter and debris removing means20US 5,437,500 AHerrenknecht AG · 1995
- Shield tunneling machine16US 4,630,869 AKabushiki Kaisha Iseki Kaihatsu Koki · 1986